diff --git a/compiler/boxes/boxcomplexity.cpp b/compiler/boxes/boxcomplexity.cpp
index 66e245f080..1a8bbfa89e 100644
--- a/compiler/boxes/boxcomplexity.cpp
+++ b/compiler/boxes/boxcomplexity.cpp
@@ -76,8 +76,6 @@ int boxComplexity(Tree box)
  */
 static int computeBoxComplexity(Tree box)
 {
-    int    i;
-    double r;
     prim0  p0;
     prim1  p1;
     prim2  p2;
@@ -92,9 +90,9 @@ static int computeBoxComplexity(Tree box)
     // simple elements
     if (xt)
         return 1;
-    else if (isBoxInt(box, &i))
+    else if (isBoxInt(box))
         return 1;
-    else if (isBoxReal(box, &r))
+    else if (isBoxReal(box))
         return 1;
 
     else if (isBoxWaveform(box))
@@ -126,7 +124,7 @@ static int computeBoxComplexity(Tree box)
     else if (isBoxFVar(box, type, name, file))
         return 1;
     // slots and symbolic boxes
-    else if (isBoxSlot(box, &i))
+    else if (isBoxSlot(box))
         return 1;
     else if (isBoxSymbolic(box, t1, t2))
         return 1 + BC(t2);
diff --git a/compiler/boxes/boxes.cpp b/compiler/boxes/boxes.cpp
index ac4ad40b1b..e57f8aee7a 100644
--- a/compiler/boxes/boxes.cpp
+++ b/compiler/boxes/boxes.cpp
@@ -41,7 +41,6 @@
 #include <string.h>
 #include "exception.hh"
 #include "global.hh"
-#include "ppbox.hh"
 #include "prim2.hh"
 #include "xtended.hh"
 
diff --git a/compiler/boxes/boxes.hh b/compiler/boxes/boxes.hh
index 9d9c1da717..d00131f40f 100644
--- a/compiler/boxes/boxes.hh
+++ b/compiler/boxes/boxes.hh
@@ -347,4 +347,24 @@ LIBFAUST_API bool isBoxMetadata(Tree s, Tree& exp, Tree& mdlist);
 // Return the number of inputs and outputs
 LIBFAUST_API bool getBoxType(Tree box, int* inum, int* onum);
 
+/**
+ * Produces "1 input" or "n inputs" according to n
+ * \param n the number of inputs
+ * \return the corresponding string
+ */
+inline std::string inputs(int n)
+{
+    return std::to_string(n) + ((n == 1) ? " input" : " inputs");
+}
+
+/**
+ * Produces "1 output" or "n outputs" according to n
+ * \param n the number of outputs
+ * \return the corresponding string
+ */
+inline std::string outputs(int n)
+{
+    return std::to_string(n) + ((n == 1) ? " output" : " outputs");
+}
+
 #endif
diff --git a/compiler/boxes/boxtype.cpp b/compiler/boxes/boxtype.cpp
index 526169df9f..cf5e7d22c5 100644
--- a/compiler/boxes/boxtype.cpp
+++ b/compiler/boxes/boxtype.cpp
@@ -80,28 +80,6 @@ LIBFAUST_API bool getBoxType(Tree box, int* inum, int* onum)
     }
 }
 
-/**
- * Produces "1 output" or "n outputs" according to n
- * \param n the number of outputs
- * \return the corresponding string
- */
-
-static string outputs(int n)
-{
-    return std::to_string(n) + ((n == 1) ? " output" : " outputs");
-}
-
-/**
- * Produces "1 input" or "n inputs" according to n
- * \param n the number of inputs
- * \return the corresponding string
- */
-
-static string inputs(int n)
-{
-    return std::to_string(n) + ((n == 1) ? " input" : " inputs");
-}
-
 /**
  * Compute a parametric type error message
  * \param a the LHS expression
diff --git a/compiler/generator/c/c_code_container.cpp b/compiler/generator/c/c_code_container.cpp
index 5b3ff458e0..03c5f07d29 100644
--- a/compiler/generator/c/c_code_container.cpp
+++ b/compiler/generator/c/c_code_container.cpp
@@ -78,7 +78,7 @@ CodeContainer* CCodeContainer::createScalarContainer(const string& name, int sub
 
 CodeContainer* CCodeContainer::createContainer(const string& name, int numInputs, int numOutputs, ostream* dst)
 {
-    gGlobal->gDSPStruct = true;
+    gGlobal->gDSPStruct = true; // for -vec -fun mode
     CodeContainer* container;
 
     if (gGlobal->gOpenCLSwitch) {
diff --git a/compiler/generator/codebox/codebox_code_container.cpp b/compiler/generator/codebox/codebox_code_container.cpp
index e2885e4003..c22dd8f424 100644
--- a/compiler/generator/codebox/codebox_code_container.cpp
+++ b/compiler/generator/codebox/codebox_code_container.cpp
@@ -85,7 +85,6 @@ CodeContainer* CodeboxCodeContainer::createScalarContainer(const string& name, i
 
 CodeContainer* CodeboxCodeContainer::createContainer(const string& name, int numInputs, int numOutputs, ostream* dst)
 {
-    gGlobal->gDSPStruct = true;
     CodeContainer* container;
 
     if (gGlobal->gOpenCLSwitch) {
diff --git a/compiler/generator/jax/jax_code_container.cpp b/compiler/generator/jax/jax_code_container.cpp
index da65f8a935..0c3b448bc0 100644
--- a/compiler/generator/jax/jax_code_container.cpp
+++ b/compiler/generator/jax/jax_code_container.cpp
@@ -85,7 +85,6 @@ CodeContainer* JAXCodeContainer::createScalarContainer(const string& name, int s
 
 CodeContainer* JAXCodeContainer::createContainer(const string& name, int numInputs, int numOutputs, ostream* dst)
 {
-    gGlobal->gDSPStruct = true;
     CodeContainer* container;
 
     if (gGlobal->gOpenCLSwitch) {
diff --git a/compiler/generator/jsfx/jsfx_code_container.cpp b/compiler/generator/jsfx/jsfx_code_container.cpp
index d167239ef4..1dcc38dfcb 100644
--- a/compiler/generator/jsfx/jsfx_code_container.cpp
+++ b/compiler/generator/jsfx/jsfx_code_container.cpp
@@ -59,7 +59,6 @@ CodeContainer* JSFXCodeContainer::createScalarContainer(const string& name, int
 
 CodeContainer* JSFXCodeContainer::createContainer(const string& name, int numInputs, int numOutputs, ostream* dst)
 {
-    gGlobal->gDSPStruct = true;
     CodeContainer* container;
 
     if (gGlobal->gOpenCLSwitch) {
diff --git a/compiler/generator/julia/julia_code_container.cpp b/compiler/generator/julia/julia_code_container.cpp
index 06624f395c..e00af0bf5a 100644
--- a/compiler/generator/julia/julia_code_container.cpp
+++ b/compiler/generator/julia/julia_code_container.cpp
@@ -71,7 +71,6 @@ CodeContainer* JuliaCodeContainer::createScalarContainer(const string& name, int
 
 CodeContainer* JuliaCodeContainer::createContainer(const string& name, int numInputs, int numOutputs, ostream* dst)
 {
-    gGlobal->gDSPStruct = true;
     CodeContainer* container;
 
     if (gGlobal->gOpenCLSwitch) {
diff --git a/compiler/generator/llvm/llvm_code_container.cpp b/compiler/generator/llvm/llvm_code_container.cpp
index 42c6ef0db9..a24f5f30a8 100644
--- a/compiler/generator/llvm/llvm_code_container.cpp
+++ b/compiler/generator/llvm/llvm_code_container.cpp
@@ -95,7 +95,7 @@ LLVMCodeContainer::~LLVMCodeContainer()
 
 CodeContainer* LLVMCodeContainer::createContainer(const string& name, int numInputs, int numOutputs)
 {
-    gGlobal->gDSPStruct = true;
+    gGlobal->gDSPStruct = true; // for -vec -fun mode
     CodeContainer* container;
 
     if (gGlobal->gFloatSize == 3) {
diff --git a/compiler/generator/rust/rust_code_container.cpp b/compiler/generator/rust/rust_code_container.cpp
index 456043bde4..4bbbc16f7a 100644
--- a/compiler/generator/rust/rust_code_container.cpp
+++ b/compiler/generator/rust/rust_code_container.cpp
@@ -61,7 +61,6 @@ CodeContainer* RustCodeContainer::createVectorContainer(const string& name, int
 
 CodeContainer* RustCodeContainer::createContainer(const string& name, int numInputs, int numOutputs, ostream* dst)
 {
-    gGlobal->gDSPStruct = true;
     CodeContainer* container;
 
     if (gGlobal->gFloatSize == 3) {
diff --git a/compiler/generator/template/template_code_container.cpp b/compiler/generator/template/template_code_container.cpp
index 9cf2abb7d3..eafe8f6a20 100644
--- a/compiler/generator/template/template_code_container.cpp
+++ b/compiler/generator/template/template_code_container.cpp
@@ -63,7 +63,6 @@ CodeContainer* TemplateCodeContainer::createScalarContainer(const string& name,
 */
 CodeContainer* TemplateCodeContainer::createContainer(const string& name, int numInputs, int numOutputs, ostream* dst)
 {
-    gGlobal->gDSPStruct = true;
     CodeContainer* container;
 
     if (gGlobal->gOpenCLSwitch) {
diff --git a/compiler/libcode.cpp b/compiler/libcode.cpp
index d9c96630a7..0ba8517dc6 100644
--- a/compiler/libcode.cpp
+++ b/compiler/libcode.cpp
@@ -300,7 +300,7 @@ static Tree evaluateBlockDiagram(Tree expandedDefList, int& numInputs, int& numO
     }
 
     if (gGlobal->gDetailsSwitch) {
-        cout << "process has " << numInputs << " inputs, and " << numOutputs << " outputs" << endl;
+        cout << "process has " << inputs(numInputs) << ", and " << outputs(numOutputs) << endl;
     }
 
     endTiming("evaluation");
diff --git a/compiler/propagate/propagate.cpp b/compiler/propagate/propagate.cpp
index 256a47f4ea..8064f2d0f3 100644
--- a/compiler/propagate/propagate.cpp
+++ b/compiler/propagate/propagate.cpp
@@ -284,8 +284,6 @@ static siglist realPropagate(Tree slotenv, Tree path, Tree box, const siglist& l
         Tree sig;
         faustassert(lsig.size() == 0);
         if (!searchEnv(box, sig, slotenv)) {
-            // test YO : diagrams simplification 
-            // cerr << "propagate : internal error (slot undefined)\n");
             sig = sigInput(++gGlobal->gDummyInput);
         }
         return makeList(sig);
@@ -359,7 +357,6 @@ static siglist realPropagate(Tree slotenv, Tree path, Tree box, const siglist& l
     }
 
     else if (isBoxFFun(box, ff)) {
-        // cerr << "propagate en boxFFun of arity " << ffarity(ff) << endl;
         faustassert(int(lsig.size()) == ffarity(ff));
         return makeList(sigFFun(ff, listConvert(lsig)));
     }
@@ -575,9 +572,9 @@ siglist propagate(Tree slotenv, Tree path, Tree box, const siglist& lsig)
         result = realPropagate(slotenv, path, box, lsig);
         setPropagateProperty(args, result);
     }
-        // cerr << "propagate in " << boxpp(box) << endl;
-        // for (int i = 0; i < lsig.size(); i++) { cerr << " -> signal " << i << " : " << *(lsig[i]) << endl; }
-        // cerr << endl;
+    // cerr << "propagate in " << boxpp(box) << endl;
+    // for (int i = 0; i < lsig.size(); i++) { cerr << " -> signal " << i << " : " << *(lsig[i]) << endl; }
+    // cerr << endl;
     return result;
 }